Given that,
y varies directly with x and y = 10 when x = 20.
To find,
The value of y when x = 15.
Solution,

Put x = 20 and y = 10

Put k = 1/2 and x = 15 to find the value of y.

So, the value of y is 7.5
Answer:
C
Step-by-step explanation:
16's square root is 4
Sorry but where is the picture? I’m confused..
Answer:
(c)
Step-by-step explanation:
3+2+4 = 9, 4+2= 6- 3= 3